---
id: a202eed8fc186c8434cb6d61
title: Reverse a String
isRequired: true
challengeType: 5
videoUrl: ''
localeTitle: 反转字符串
---
## Description
反转提供的字符串。您可能需要先将字符串转换为数组，然后才能将其反转。您的结果必须是字符串。如果卡住，请记得使用Read-Search-Ask 。编写自己的代码。
## Instructions
## Tests
```yml
tests:
- text: reverseString("hello")应该返回一个字符串。
testString: 'assert(typeof reverseString("hello") === "string", "reverseString("hello") should return a string.");'
- text: reverseString("hello")应该变成"olleh" 。
testString: 'assert(reverseString("hello") === "olleh", "reverseString("hello") should become "olleh".");'
- text: reverseString("Howdy")应该变成"ydwoH" 。
testString: 'assert(reverseString("Howdy") === "ydwoH", "reverseString("Howdy") should become "ydwoH".");'
- text: reverseString("Greetings from Earth")应返回"htraE morf sgniteerG" 。
testString: 'assert(reverseString("Greetings from Earth") === "htraE morf sgniteerG", "reverseString("Greetings from Earth") should return "htraE morf sgniteerG".");'
```
## Challenge Seed
```js
function reverseString(str) {
return str;
}
reverseString("hello");
```
## Solution
```js
// solution required
```